diff --git a/makefu/1systems/x/config.nix b/makefu/1systems/x/config.nix
index 169f32c16..ea92e3485 100644
--- a/makefu/1systems/x/config.nix
+++ b/makefu/1systems/x/config.nix
@@ -71,7 +71,7 @@
       # Virtualization
       # <stockholm/makefu/2configs/virtualisation/libvirt.nix>
       <stockholm/makefu/2configs/virtualisation/docker.nix>
-      #<stockholm/makefu/2configs/virtualisation/virtualbox.nix>
+      <stockholm/makefu/2configs/virtualisation/virtualbox.nix>
       #{
       #  networking.firewall.allowedTCPPorts = [ 8080 ];
       #  networking.nat = {
@@ -162,7 +162,11 @@
   krebs.tinc.retiolum.connectTo = [ "omo" "prism" "nextgum" "wbob" ];
 
   # hard dependency because otherwise the device will not be unlocked
-  boot.initrd.luks.devices = [ { name = "luksroot"; device = "/dev/sda2"; allowDiscards=true; }];
+  boot.initrd.luks.devices.luksroot =
+  {
+      device = "/dev/sda2";
+      allowDiscards = true;
+  };
   # avoid full boot dir
   boot.loader.grub.configurationLimit = 3;